andriod 图片选择器

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.genwoxue.pictureviewer"
    android:versionCode="1"
    android:versionName="1.0" >  

    <uses-sdk
        android:minSdkVersion="10"
        android:targetSdkVersion="15" />  

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.genwoxue.pictureviewer.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.GET_CONTENT" />
                <category android:name="android.intent.category.DEFAULT" />
                <category android:name="android.intent.category.OPENABLE" />
                <data android:mimeType="image/jpeg" />
            </intent-filter>  

        </activity>
    </application>  

</manifest>  

mport android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;  

public class MainActivity extends Activity {  

    private Button btnChoose=null;
    @Override
     public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btnChoose=(Button)super.findViewById(R.id.choose);
        btnChoose.setOnClickListener(new OnClickListener(){
            public void onClick(View v)
            {
                //系统会把所有查看Image类型的应用显示在列表中
                Intent intent=new Intent();
                intent.setAction(Intent.ACTION_GET_CONTENT);
                intent.setType("image/*");
                MainActivity.this.startActivity(intent.createChooser(intent, "选择图片查看APP"));
            }
        });
    }
}